Taco 3-way iseries Heat demand fail

[psykar]

Hi,

I recently installed an indoor wood boiler. The setup consists a boiler loop, attached to a supply loop which is connected underground to my house.

There is a taco 3-way valve installed in order to stabilise the supply temp @ 180F minus and also to prevent shocking the boiler. In normal condition this seems to be doing ok. Piping & wiring is, as far as I know, as per the taco documentation.

Now, if I switch on the garage loop (sub zero temps at start) the valve will adjust itself to protect the boiler (as it should). But then, it seems it will let the boiler temperature creep up without supplying 180F water to garage/house piping as intended.
I can look a the state of the system at some point & the boiler could be at 190F but the supply loop only running @ 90F. The system could become overload quite easyly with an excessive solid fuel load.
To say the least, the valve has to operate as intended. Anything I overlooked?

Thanks,
JP

[psykar]

Hi,

I recently installed an indoor wood boiler. The setup consists a boiler loop, attached to a supply loop which is connected underground to my house.

There is a taco 3-way valve installed in order to stabilise the supply temp @ 180F minus and also to prevent shocking the boiler. In normal condition this seems to be doing ok. Piping & wiring is, as far as I know, as per the taco documentation.

Now, if I switch on the garage loop (sub zero temps at start) the valve will adjust itself to protect the boiler (as it should). But then, it seems it will let the boiler temperature creep up without supplying 180F water to garage/house piping as intended.
I can look a the state of the system at some point & the boiler could be at 190F but the supply loop only running @ 90F. The system could become overload quite easyly with an excessive solid fuel load.
To say the least, the valve has to operate as intended. Anything I overlooked?

Thanks,
JP

I attached the power supply wires in a way to prevent counter-clockwise of the actuator. It seems it was was just spinning the unit before. We'll see it it works.

[psykar]

Same situation, the actuator positioned itself vertically looping supply loop on its own. Boiler temps where close to 210F. Fortunately the extinguishing blowoff did not go off.
What could be doing such a thing? Deffective valve?

[skippedover]

If the valve is modulating to protect the boiler, I'd suspect the system temperature sensor is out of calibration. What status' are the LEDs?

[psykar]

LED is solid green, refering to the manual, that would be heat demand mode.
I added some insulation over the sensor ( only electric tape before). Not sure it would change much but there anyways.